Analytical modeling of call admission control for real-time and elastic services in inter satellite link
Sergey N. Stepanov, Andrey I. Romanov, Mikhail Sergeevich Stepanov, Alexander P. Vasilyev · 2018
The model of joint servicing by inter satellite link the real time traffic and elastic data traffic is proposed. Flow of requests for real time servicing is described by Poisson model (narrowband traffic) or Engset model (broadband traffic). Flow of requests for data transmission is described by Poisson model. Real time traffic has advantage in occupying link transmission resources. It exhibits itself in decreasing if necessary the speed of data transmission to some minimum value. When link has free capacity the speed of data transmission is increasing. The duration of servicing of requests for real time traffic transmission has exponential distribution and doesn't depend on model's state. The duration of servicing of requests for elastic data transmission also has exponential distribution but with parameter depending on available free link transmission capacity. In framework of the proposed model the definitions of main performance measures of traffic transmission are formulated through values of probabilities of model's stationary states. The algorithm of estimation the introduced performance measures based on the solving the system of state equations is suggested. The proposed model and the results of its analysis can be used for estimation the required transmission capacity of inter satellite link for given volumes of real time and elastic traffics.